^^^That is so much more complicated than it needs to be. Just swing your effin' leg over the front.

For some reason, I have never been able to do a rear dismount, but I love doing the moving dismount over the side. I unclip both feet while slowing and let the left pedal lift/launch me off to the side, swinging my right leg around the back, all while holding onto the bars normally. Then I just grab the stem once I hit the ground. Basically the opposite of mounting. It's even more fun when moving faster than walking pace.